Modification of rapeseed oil by ethoxylation and hydroxylation and its use as fatliquoring agent;
菜籽油的羟化乙氧(基)化改性与加脂应用
Study on Ethoxylation of Fatty Alcohol Catalyzed by Lipase;
脂肪酶催化脂肪醇乙氧(基)化研究
Influence of molding technics on particle of Al-Mg composite oxide (MAO) in ethoxylation;
成型工艺条件对粒状镁铝复合氧化物催化乙氧(基)化的影响
The main chain of the comb polymer was hydrophobic polythene segments;and the side chain was polyalkylene oxide.
以乙烯-乙烯醇共聚物(EVOH)为原料,制备了一种主链为疏水的聚乙烯链段,侧链具有亚乙氧(基)结构的多羟基梳形聚合物,用元素分析法、凝胶渗透色谱法、核磁共振谱法对其进行了结构表征;用热重分析法和示差扫描量热法对其热学性能进行了表征。
It was discussed that the main factors having effect on the vulcanization time of RTV block methyl silicone rubber, such as the mol ratio of ethoxyl and silicone hydroxyl, the pH value of methyltriethoxysilane, and the content of iron ions impurity in methyltriethoxysilane, temperature, moisture, and the quantity of catalyst.
讨论了影响甲基嵌段室温硫化硅橡胶硫化时间的主要因素,如:乙氧(基)与硅羟基的量之比,甲基三乙氧(基)硅烷低聚物的pH值、铁离子的含量,以及温度、湿度和催化剂的用量等;并介绍了预防和控制这些影响因素的方法。
Synthesis and Properties of 3-azidomethyl-3-cyanoethoxylmethyloxetane Polymer;
3-叠氮甲基-3-氰乙氧(基)甲基氧丁环均聚物的合成与性能
Determination of ethoxyquin content by non aqueous titration with perchloric acid was carried out in mixed solvent of glacial acetic acid (50mL) and acetic anhydride (1mL) with crystal violet as indicator .
研究了用高氯酸标准溶液对乙氧(基)喹含量的非水滴定 ,具体方法为 :精确称乙氧(基)喹0 2 g ,加 5 0mL冰乙酸、1mL乙酸酐、加 2滴结晶紫指示剂 ,用高氯酸标准溶液滴定至溶液由蓝紫色变为绿色。
The results in-dicate that the loss of aβ-hydrogen from 2-hydroxyethyl radical to yield vinyl alcohol and that a 1,3-hydrogen shift to form ethoxy radical have close A factors and rate constants.
用量子化学结果和Ｅｙｒｉｎｇ过渡态理论计算了２００－１２００Ｋ温度范围内，标题反应的Ａ因子和速度常数，结果表明，２－羟乙基脱去β－Ｈ生成乙烯醇与其经［１，３］重排生成乙氧(基)有相近的Ａ因子和速度常数，且常温下速度较慢，反应难以进行。